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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9148036 B1

PDFFull Text
Date of Patent:
Sep. 29, 2015

Filed:

Feb. 19, 2013

Base member of a motor which includes specific surface structure

Applicant:

Nidec Corporation, Kyoto, JP;

Inventors:

Junzo Fujinawa, Kyoto, JP;

Koji Baba, Kyoto, JP;

Yuki Masumi, Kyoto, JP;

Assignee:

Nidec Corporation, Kyoto, JP;

Attorney:

Keating & Bennett, LLP

Primary Examiner:

Brian Miller

Int. Cl.
CPC ...
G11B 19/20 (2006.01); G11B 33/12 (2006.01); H02K 5/22 (2006.01); H02K 15/14 (2006.01); H02K 15/02 (2006.01); H02K 5/04 (2006.01); H02K 11/00 (2006.01); H02K 7/14 (2006.01);
U.S. Cl.
CPC ...
H02K 5/22 (2013.01); G11B 19/2009 (2013.01); H02K 5/04 (2013.01); H02K 5/225 (2013.01); H02K 11/0073 (2013.01); H02K 15/02 (2013.01); H02K 15/14 (2013.01); G11B 33/121 (2013.01); H02K 7/14 (2013.01); H02K 2211/03 (2013.01); Y10T 29/49009 (2015.01); Y10T 29/49012 (2015.01); Y10T 29/49636 (2015.01);
Abstract

A thin base member for use in a disk drive apparatus in which a bearing mechanism and an actuator are arranged includes a plurality of lower recess portions, a C-shaped smooth surface, and a fan-shaped recess portion. The C-shaped smooth surface is arranged in a region of an upper surface of the base member to at least partially encircle the region where the bearing mechanism is arranged and the C-shaped smooth surface has a height constant or substantially constant in a circumferential direction. At least a portion of each of the lower recess portions is provided below the C-shaped smooth surface, in which the C-shaped smooth surface has a cross section positioned at the lower recess portions to protrude in a direction toward which the upper surface of the base member faces or in a direction toward which the lower surface of the base member faces.

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